Pcm Code P020 - Open Fuel Pump Circuit (2 Of 3)
NOTE:
Test numbers refer to numbers on diagnostic chart.
- 3)
Checks for proper control of fuel pump relay by PCM. - 4)
Checks for open from fuel pump fuse to relay terminal No. 5. - 5)
Checks for open from relay terminal No. 2 to ground. - 6)
Checks continuity for complete fuel pump circuit from fuse A1 through fuel pump windings to ground. Using a DVOM to jumper contact cavities of relay connector, DVOM should read greater than 10 volts if circuit is okay. If circuit is okay, fuel pump relay is faulty. - 7)
If relay or relay drive circuits are grounded, PCM may be damaged by excessive current draw if battery voltage is greater than 16 volts. Repair fault, and check for proper operation. - 8)
Fault is most likely at PCM connector or PCM. Before replacing PCM, check for damaged terminals or poor connections. - 9)
Refer to appropriate WIRING DIAGRAM article.